<template>
    <div class="sidebar">
        <el-menu
                class="sidebar-el-menu"
                :default-active="onRoutes"
                :collapse="collapse"
                background-color="#324157"
                text-color="#bfcbd9"
                active-text-color="#20a0ff"
                unique-opened
                router
        >
            <template v-for="item in items">
                <template v-if="item.children">
                    <el-submenu :index="item.menuIndex" :key="item.menuIndex">
                        <template slot="title">
                            <i :class="item.menuIcon"></i>
                            <span slot="title" class="menu-span-level">{{ item.menuTitle }}</span>
                        </template>
                        <template v-for="subItem in item.children">
                            <el-submenu
                                    v-if="subItem.children"
                                    :index="subItem.menuIndex"
                                    :key="subItem.menuIndex"
                            >
                                <template slot="title">
                                    <span slot="title" class="menu-span">{{ subItem.menuTitle }}</span>
                                </template>
                                <el-menu-item
                                        v-for="(threeItem,i) in subItem.children"
                                        :key="i"
                                        :index="threeItem.menuIndex"
                                >
                                    <span slot="title" class="menu-span">{{ threeItem.menuTitle }}</span>
                                </el-menu-item>
                            </el-submenu>
                            <el-menu-item
                                    v-else
                                    :index="subItem.menuIndex"
                                    :key="subItem.menuIndex"
                            >
                                <span slot="title" class="menu-span">{{ subItem.menuTitle }}</span>
                            </el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.menuIndex" :key="item.menuIndex">
                        <i :class="item.menuIcon"></i>
                        <span slot="title" class="menu-span-level">{{ item.menuTitle }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
    import bus from '../components/common/bus';
    import { sidebarData } from '../api/sidebar';

    export default {
        data() {
            return {
                collapse: false,
                items: [],
                success: false,
                data: [],
                query: {
                    userAcct: localStorage.getItem('ms_userAcct'),
                },
            };
        },
        computed: {
            onRoutes() {
                return this.$route.path.replace('/manage', '');
            }
        },
        created() {
            // 通过 Event Bus 进行组件间通信，来折叠侧边栏
            bus.$on('collapse', msg => {
                this.collapse = msg;
                bus.$emit('collapse-content', msg);
            });
            this.getData();
        },
        methods: {
            // 获取后台数据
            getData() {
                if (localStorage.getItem('ms_userAcct') == "admin") {
                    sidebarData(this.query).then(response => {
                        if (response.success == true) {
                            this.items = response.data;
                        } else {
                            this.$message.error("菜单获取失败！");
                            this.items = [];
                        }
                    }).catch((e) => {
                        console.log(e)
                    });
                } else {
                    sidebarData(this.query).then(response => {
                        if (response.success == true) {
                            this.items = response.data;
                        } else {
                            this.$message.error("菜单获取失败！");
                            this.items = [];
                        }
                    }).catch((e) => {
                        console.log(e)
                    });
                }
            }
        }
    };
</script>

<style scoped>
    .sidebar {
        display: block;
        position: absolute;
        left: 0%;
        top: 8%;
        bottom: 0;
        width: 10%;
        overflow-y: scroll;
    }

    .sidebar::-webkit-scrollbar {
        width: 0;
    }

    .sidebar-el-menu {
        width: 100%;
    }

    .sidebar > ul {
        height: 100%;
    }

    .menu-span {
        font-size: 12px
    }

    .menu-span-level {
        font-size: 17px
    }
</style>
